LR45 ENVIRONMENTAL CONTROL SYSTEM CAS Flashcards
L R BLEED AIR LEAK (RED)
A leak detection sensor along the bleed air ducting in the tailcone has activated (> 255F)
- The APU will automatically shut down with a bleed air leak detected.
- When operating with only one engine supplying bleed air, maintaining N1 greater than 75% should provide adequate bleed air for anti-icing while exiting icing conditions.
CABIN ALTITUDE (RED)
Cabin altitude > 10,000 ft.
- Descent from 51,000 feet to 15,000 feet requires approximately 4 minutes 20 seconds
- Selecting IAS on PFD for airspeed below FL 310 will minimie inadverent overspeed.
- The thrust lever MUTE button will mute the “CABIN ALTITUDE” voice for 60 seconds.
- Communication with passengers can be accomplished by using the PA function of the Audio Control Panel.
L R ENG PYLON OVHT (RED)
A leak detection sensor in the engine pylon or tailcone (prior to the SOV) has activated (> 250F)
L R BLEED OVHT (YELLOW)
Excess bleed air duct temperature, > 700 F; dependent on engine type
CABIN ALTITUDE (YELLOW)
Cabin altitude > 8,750 ft and field elevation < 8,000
Cabin altitude > 14,500 and field elevation > 8,000 and descended to < 25,000
- The emergency pressurization valves will automatically reposition to the emergency mode if cabin altitude increases above limits and route low-stage bleed air into cabin and LR EMER PRESS ON amber CAS will illuminate.
- The wing and stabilizer bleed air anti-ice and nacelle inlet anti-ice will be available with emergency pressurization on.
CAB DELTA P (YELLOW)
Cabin delta P > 9.5 (9.9 manual) or < negative 0.5 psid
CAB DUCT OVHT (YELLOW)
Temperature control valve malfunction; supply duct temp > 300 F
- If thrust levers are reduced to idle, pressurization airflow will reduce and cabin altitude will climb.
- If thrust levers are reduced to idle with EMER PRESS ON, pressurization airflow will reduce and cbin altitude will climb.
L R CAB PRESS FAIL (YELLOW)
Total loss of CPCS, both channels failed - display blank, system goes to maximum delta P, amber dashes displayed on ECS synoptic schematic
- If LR CAB PRESS FAIL amber CAS is accompanied by a DAU 1A FAIL amber CAS, the cabin pressurization system may not have failed. Refer to DAU 1A FAIL procedure, this section.
CAB PRESS MAN (YELLOW)
CPCS reverted to manual rate mode (dual ADC fail), crew cannot deselect
Hats and “ear-muff” type headsets must be removed prior to donning crew oxygen masks.
CKPT DUCT OVHT (YELLOW)
Temperature control valve malfunction; supply duct temp > 300F
L R ECS FAIL (YELLOW)
A failure has been detected in the respective channel of the ECS controller; emer press lost
- If thrust levers are reduced to idle, pressurization airflow will reduce and cabin altitude will climb.
L R ECS FAULT (YELLOW)
A fault has been detached in the respective channel of the ECS Controller
L EMER PRESS ON
R EMER PRESS ON
L R EMER PRESS ON
(YELLOW)
L and/or R emer press valve open (manual or auto)
When operating with only one engine supplying bleed air, maintaining N1 greater than 75% should provide adequate bleed air for anti-icing while exiting icing conditions.
PACK OVHT (YELLOW)
PACK compressor discharge overtemp (> 450F)
- Descending to a lower altitude may reduce the PACK compressor discharge air temperature.
- When operating with only one engine supplying bleed air, maintaining N1 greater than 75% should provide adequate bleed air for anti-icing while exiting icing conditions.
L R CAB PRESS FAIL (WHITE)
L or R pressurized channel failed; operation automatically shifts to alternate channel
